update required garden version

Author: dessant

setup.py

@@ -956,4 +956,4 @@ def get_extensions_from_sources(sources):
         'Topic :: Software Development :: User Interfaces'],
     dependency_links=[
         'https://github.com/kivy-garden/garden/archive/master.zip'],
-    install_requires=['Kivy-Garden==0.1.1'])
+    install_requires=['Kivy-Garden==0.1.4'])